Water-tube boiler.



W. D. CHESTER & H. B. RUST. WATER TUBE BoILBR. APPLICATION FILED MARAD, 1910.

995,523., Patented June 20,1911.

v TER .and HENRY WILFRED D. CHESTER AND HENRY CORPORATIONF NEW JERSEY.

B. EUST, 0F PITTSBTILB'G,- PENNSYLVANIA, AS- SIGNORS TO 'SHE BABCOCK t WILCOX COMPANY, 0F BAYONNE, NEW JERSEY, A'

Specification of Letters Patent.

Patented J une 20, 1911.

Application led March 10, 1910. Serial No. 548,464.

To all whom 'it may concern.

Be it known that we, WILFRED D. CHES- B. RUST, citizens of the United States of America, residing at Pittsburg, in the county of Allegheny and 'State of Pennsylvania, have inv'ented certain new and useful Improvements in Water-Tube Boilers, of which the following is a specification.

The object of this invention lis to increase the efiiciencyof a water-tube boiler of the form described by bringing the products of combustion into a more intimate contact with the heating surface by forcing the gases to crossand recross the tubes a nurnber of times as well as passing them in a longitudinal direction, without throttling at any point except when specially desir-' able, and will be understood by reference to the accompanying drawing w tical section through a boiler setting show-l ing our improved method of bafiing.

In the drawing, l is a water drum extending laterally of the furnace; 2 a steam and water drum placed above 1 in a osition parallel to it and connected with 1t by a plurality and by a group 5 of two or more lines of straight tubes in an intermediate position' between the groups of bent tubes, the spaces between each of the groups 3 and group 5 being suiiicient for the entrance of a man when repairs to the baffle may be necessary. Between the lines of tubes of group 5 there is placed a wall 6 of tire brick, said wall being held in position by the lines oftubes forming the group and extending from side wall to side wall of the boiler and upwardly from they bottom drum, and terminating short of the upper or steam and water drum to permit the gases to cross from the group of tubes 3 to the group 4. At intervals in the height-of this wall or diaphragm there are placed horizontal baffles or shelves 7 extending from the middle ich is a ver-I of groups of bent tubes 3 and 4 4 and the bent tubes.

`either 'placed at 'a distance to allow a man to enter group 5 toward groups 3 and 4 to the eX- tent that spaces betwen `groups 3 and '-4 and group 5 are divided into several chambers Spaces `8 and 9 eX-' in a vertical direction.

ist respectively between groups or tubes 3 and 4 and the front and rear walls of the tact with the roup 4..,

What we c aim and desireto secure by Letters Patent of the United States is:-

1. In a water-tube boiler having horizontal water and steam and water drums, a'

group of straight tubes adjacent to a' vertical lane passing through the center line of t e two drums, groups of bent tubes on either side of 'said'group of straight tubes placed at a distance from the said group ot straight tubes a sufcient distance to allow a man to enter the said space, a wall between the straight tubesV and supported by them, said wall resting on the water drum and eX- tending from side wall to side -wall, and

at intervals along thev horizontalv baiiies supported by said vertical Iwall and the straight tubes and extending straight tubes toward the from the group of groupvof bent tubes, and inclined baffles eX- tending from the front and rear-walls to the 2. In a water-tube boiler` having horizontal water and steam and water drums, a group 'of'straight tubes adjacent to a vertical plane passing through the center line of the two drums, groups of bent tubes on side' f said group of straight tubes the said space, a wall between the straight tubes and supported by them, said well resting on the Water drum and extending from side wall te side Wall, spaces intervening -between the groups of bent tubes and the front and rear boiler'walls having Within them projecting ledges extending from the Walls toward the Groups of bent tubes.

In testimony Wleref We have hereunto xsigned our names in the presence of two' subscribing witnesses.

WILFRED n. CHESTER. HENRY B. RUST.

'Vtnesses: M. L. SCANLON, ALICE A. TRILL. 

